Loading species data...
Fetching observations
Pacific Banana Slug
Ariolimax columbianus
15,716 observations
Horned Nudibranch
Hermissenda crassicornis
6,430 observations
Black Slug
Arion ater
3,477 observations
Frilled Dogwinkle
Nucella lamellosa
3,312 observations
Pacific Sideband
Monadenia fidelis
3,016 observations
Leopard Slug
Limax maximus
2,702 observations
Brown-lipped Snail
Cepaea nemoralis
2,692 observations
Monterey Dorid
Doris montereyensis
2,562 observations
Lewis's Moon Snail
Neverita lewisii
2,544 observations
Garden Snail
Cornu aspersum
2,066 observations
White-lined Dirona
Dirona albolineata
2,023 observations
Mossy Chiton
Mopalia muscosa
1,838 observations
Nuttall's Cockle
Clinocardium nuttallii
1,561 observations
Lined Chiton
Tonicella lineata
1,556 observations
Northern Leopard Dorid
Diaulula odonoghuei
1,384 observations
Giant Nudibranch
Dendronotus iris
1,299 observations
Oregon forestsnail
Allogona townsendiana
1,158 observations
barnacle-eating dorid
Onchidoris bilamellata
1,103 observations
Branched Dendronotid
Dendronotus venustus
1,081 observations
Gumboot Chiton
Cryptochiton stelleri
1,077 observations
Woody Chiton
Mopalia lignosa
1,056 observations
Three-lined Aeolid
Orienthella trilineata
1,045 observations
Hooded Nudibranch
Melibe leonina
953 observations
White-and-orange-tipped Nudibranch
Antiopella fusca
941 observations
Nanaimo Dorid
Acanthodoris nanaimoensis
916 observations
Purple Mahogany Clam
Nuttallia obscurata
883 observations
Milky Slug
Deroceras reticulatum
873 observations
Red Sponge Dorid
Rostanga pulchra
840 observations
Striped Dogwinkle
Nucella ostrina
837 observations
Robust Lancetooth Snail
Haplotrema vancouverense
803 observations
Black Leather Chiton
Katharina tunicata
734 observations
Modest Clown Dorid
Triopha modesta
724 observations
Green Falsejingle
Pododesmus macrochisma
717 observations
Yellow-bordered Taildropper
Prophysaon foliolatum
699 observations
Rough Keyhole Limpet
Diodora aspera
639 observations
East Pacific Red Octopus
Octopus rubescens
588 observations
Opalescent Inshore Squid
Doryteuthis opalescens
552 observations
Noble Dorid
Peltodoris nobilis
551 observations
Rough Piddock
Zirfaea pilsbryi
529 observations
Pacific Razor Clam
Siliqua patula
497 observations
Northwest Hesperian
Vespericola columbianus
495 observations
Festive Tritonid
Tritonia festiva
480 observations
Butter Clam
Saxidomus gigantea
480 observations
Pacific Oyster
Magallana gigas
456 observations
Reticulate Taildropper
Prophysaon andersonii
454 observations
California Mussel
Mytilus californianus
442 observations
Mask Limpet
Lottia persona
411 observations
Rocky Aeolid
Eubranchulus rupium
409 observations
Fingered Limpet
Lottia digitalis
390 observations
Striped Nudibranch
Armina californica
379 observations
Frequently Asked Questions
- The 10 most common molluscs in Washington are:
- Pacific Banana Slug (Ariolimax columbianus)
- Horned Nudibranch (Hermissenda crassicornis)
- Black Slug (Arion ater)
- Frilled Dogwinkle (Nucella lamellosa)
- Pacific Sideband (Monadenia fidelis)
- Leopard Slug (Limax maximus)
- Brown-lipped Snail (Cepaea nemoralis)
- Monterey Dorid (Doris montereyensis)
- Lewis's Moon Snail (Neverita lewisii)
- Garden Snail (Cornu aspersum)
- The most observed mollusc in Washington is Pacific Banana Slug (Ariolimax columbianus), with 15,716 recorded observations.